Hydraulic Component Catalog (Detailed version) (For construction equipment, industrial vehicles, agricultural equipment, and other industrial equipment) ● This catalog provides detailed information on hydraulic pumps, motors, integrated HSTs, cylinders, and valves for vehicles such as excavators, mini-excavators, loaders, forklift trucks, and agricultural machines. As for information on some products Products for Each Machine (examples) not included in this catalog, please contact KYB Hydraulic Sales Department. ● Some products require prototype tests based on the specifications of customer machines so as to secure their on-site fine Hydraulic Equipment for Excavators and Mini-excavators tuning. In some cases, new functions need to be added to our products to meet customer requirements. ● The catalog makes general suggestions for product selection, handling precautions, and basic dimensions. Confirmation on detailed specifications may be necessary for actual use. Please contact KYB Sales Department for clarification of details. (Refer to Page 66 and to the back cover of the catalog for the contact details of Sales Department.) Basics of Oil Hydraulics Cylinder (CYL) – double-acting type 【Unit conversion table】 【What is oil hydraulics?】 Piston Pump (PP): Oil hydraulics refer to a group of devices or a variable displacement type system that drives a hydraulic pump with power sources, such as engines and electric motors, to transform mechanical energy to fluid energy in order to produce mechanical movement using an actuator like a cylinder while controlling energy output. Traveling Motor (with reduction gear) Sectional Valve (for excavator) Monoblock (solid casting) Swing Motor(with reduction gear) Valve (for excavator) Hydraulic Equipment for Forklift Truck ※ In the hydraulic system, the (mechanical) power source rotates the hydraulic pump, by which the oil is drawn from the reservoir. The oil flows into the hydraulic actuator via the hydraulic valve. The actuator Lift Cylinder – single acting type transmits generated power to the machine and activates it. Gear Pump (GP): fixed displacement type Control Valve Semi-monoblock Valve (for Forklift) Hydraulic Equipment for Combines 【Basic Configuration of Hydraulic Circuit】 【Hydraulic Circuit Example】 Gear Pump (GP): fixed displacement type Mini-motion Package ※ When the tip of the actuator is loaded, the oil pressure between the pump and actuator rises. HST for Traveling 1 2 Caution regarding this Product Brochure Precautions on the Use of Hydraulic Equipment Definition of Alert Marks All Hydraulic Circuits In this brochure, the“Danger” “Warning” , , and“Caution”signs are defined as follows. ※ When selecting hydraulic components, contact each manufacturer for the characteristics of hydraulic equipment such as piping, joints, filters, and oil reserviors manufactured by other manufacturers. ※ These warning signs are very important for the operator’ s safety. Understand them before using the products. Pressure drop: Pressure drop is proportional to the square of the flow rate. Because the loss may increase depending on Danger Improper handling will result in an imminently dangerous situation such as death or serious injury. the specific equipment and the size and/or length of joints, the normal flow rate and the maximum flow rate being used also Warning Improper handling may potentially risk death or serious injury. should be taken into account. Caution Improper handling may result in slight to moderate injury or damage. Circuit temperature control: The temperature of the hydraulic fluid in the entire circuit may rise because of the operation frequency and/or pressure drop. Consult the component manufacturer to make sure the reservoir and cooler capacity is sufficient. Instruction Manual Hydraulic Fluids ● Applicable hydraulic fluids ● Applicable hydraulic fluids The cautions and notices described in this manual are intended to help select products. Please read the manuals of the selected products and fully understand the properties of the selected products before using them. Regulations and Standards Please observe the warnings and cautions described in this manual and the following regulations and standards for the safe use of products. [Safety related regulations and standards] High Pressure Gas Safety Law, Industrial Safety and Health Law, Fire Service Law, Explosion Protection Classes, ● Strainers and Filters Construction of Pressure Vessels (JIS B 8243), and General Rules for Hydraulic Systems (JIS B 8361) Apply a 150 mesh strainer to the suction line from a reservoir and a 10μm filter to the return line to the reservoir. Determine the capacity based on the pump flow rate on the maximum input rotation and maintain the pressure drop below 0.03 MPa. Safety Precautions <Hydraulic fluid contamination level control> It is recommended to maintain hydraulic fluid contamination within the NAS 9 class range. (1) On Product Handling ● Circuit Oil Temperature Caution Wear necessary protective equipment when handling the product so as to prevent any injury. Permissible oil temperature range: -20℃ (starting temperature) up to 100℃ (total 100 hours), and between 20℃ and 80℃ Caution Always be alert to avoid getting your hand pinched or suffering a backache from an unnatural operating posture or for a continuous operation. overload when handling the product. Please contact us when you plan to use the equipment outside the permissible oil temperature range. Caution Do not step on, strike, drop, or apply stress to the product. Such an act may cause malfunction, damage, or oil leakage. Precautions on Handling Pump/Motor Caution Oil on a product or the floor makes it slippery and dangerous. When you find the hydraulic fluid on the product or the floor, wipe it off immediately. ■ Mounting In general, the pump/motor can be mounted in any direction. But the drain piping should be connected to the reservoir at a (2) On Mounting and Dismounting products point lower than the oil level after it is taken out from the upper surface of the pump/motor housing. This is to lubricate the reduction gears. Please note that the travel motor and the swing motor are to be mounted in the specified direction. Caution Mounting, dismounting, piping, and wiring should be performed only by a qualified engineer (preferably one who has Make sure that the rotating direction is correct for both pump and motor. been trained by KYB) with the required knowledge. Make sure there is some allowance between the pump shaft and driving shaft (with a motor or engine), and between the Warning Before starting such work, make sure that the machine is turned off, the motor or engine is not in motion, and motor shaft and driven shaft (on the load side), in either case in the radial direction. Avoid applying thrust load to the pump pressure inside the hydraulic piping is zero. or motor shaft. Warning Turn off the power supply before doing wiring work. A failure to do so may cause an electric shock. Maintain the center dislocation between the pump and driving shafts, and between the motor and driving shafts within 0.1 Caution Keep the mounting holes and surfaces of the product clean. A loose bolt or broken seal may cause damages or oil mm on FIR (full indicator reading). leakage. Caution When mounting the product, use specified bolts only and tighten them with the specified torque. A failure to do so ■ Selecting Shaft End Configuration may cause malfunction, damage, or oil leakage. Select a shaft end configuration appropriate for the driving system based on the following pump and motor requirements. (3) On Operation Direct driving: When it is difficult to give some allowance in the radial direction, use a spline shaft. Make sure to apply lubricant and dust-protection to the spline. Selecting a counterpart spline with the surface hardness over HRC 50 and the Danger Use only explosion- or combustion-proofed products in a explosive or combustible state. surface roughness below 32a is recommended. Warning Apply a protection cover on the rotation shaft of the pump and motor to avoid your hand or clothing being caught in Coupling driving: When using a flexible coupling, select one with a straight shaft and assemble it in such a way that no the machine. thrust load is applied to the pump motor shaft. (See Fig. 2 below.) Caution If you find something wrong, such as strange sound, oil leakage and smoke, stop the operation immediately and take Applicable shaft configurations vary depending on the product. Please contact us for details. necessary action. A failure to do so may cause damage, fire, or injuries. Caution Make sure that the hydraulic circuits and wiring are properly connected with no loose connections before the initial 【Pump/Motor Shaft Driving System】 operation. Caution Use the product only according to the specifications described in the catalog and drawings, and the specifications provided by KYB. Caution The product becomes very hot during operation because of a rise in the temperature at the circuit oil and the solenoid valve. Make sure that the operator’s hand or another part of his body does not touch such heated parts. A failure to do so may cause burns. Caution Use the specified or proper hydraulic fluid and keep the contamination level within the recommended range. A Fig. 2 Example of Fig. 1 Example of failure to do so may cause malfunction or damage. Direct Driving Coupling Driving ※ Spline shaft ※ Straight shaft (4) On Maintenance and Storage Caution Any alteration or modification of the product by a customer is strictly prohibited. Caution Do not disassemble and reassemble the product without permission of KYB or its authorized agency. A violation ■ Pump Suction Pressure and Piping may cause poor performance, damage, or an accident. During a normal pump operation, maintain pressure on the pump suction port (less than 30 mm from the port surface) above Caution Transport or store the product in a proper environment at a proper temperature and humidity with proper dust- and -0.02 MPa. Pressure may come down as low as -0.05 MPa for a short while on a cold start, but air suction from the piping rust-preventative measures in place. should be strictly avoided. For the suction side piping, use pipes with a diameter equal to or larger than the diameter of the Caution Replacing seals may be necessary after storing the product for a long period. pump suction port and try to keep the length as straight and short as possible. 3 4 etc. Hydraulic Oils. mechanisms. ■ MMP Series (Electro-hydraulic cylinders) …………………41 ◇ When mounting a valve. and fill the cylinder with oil. the product life shortens and ■ Motors ■ Hydraulic Motor (General)………………………………………………………………21 excessive back pressure may damage the motor at an early stage of its life. functions. cavitation may occur at a low-pressure area when the motor stops running. and Valves): General categorization of KYB products ● Equipment (Gear Pumps. ■ Motors with re.) ● On Operation ◇ Set the valve lever at the neutral position when starting an operation. Motors. it may cause the actuator to ■ Valves ■ Hydraulic Valve (General) ………………………………………………………………45 start running unexpectedly. wheel loaders.or meter-out circuit is pressurized highly and constantly. ■ Gear Pumps ■ KP. ■ KVS.5 MPa at the suction port.) …… … ………………49 ■ Single-function valves ■ Flow control valve (FC) ………………………………………61 ■ Down safety valve (DS) ………………………………………61 ■ Hose rupture valve (HRV) ……………………………………61 ■ Principle Formulas ……………………………………………63 ■ Additional Information ■ Tightening Torques. ◇ Use an operation link that does not apply a horizontal load to the spool. HSTs. ● Rust Protection When leaving the rod extended after the cylinder is mounted on the equipment. and KFS Series (Single) …………………………8 If you have done so. noise. (This will not apply to some pumps that do not need drain piping. KVMF. and KVMT Series Definition of terms frequently used with hydraulic circuit trouble (for forklift trucks. applications. ● Series: Each model Dimensions. circuits.■ Piston Pump Motor Drain Piping and Case Internal Pressure ◇ Drain piping is to be connected to the reservoir at the point lower than the reservoir oil level after being taken out from the Table of Contents point higher than the pump/motor housing. ■ Multiple Control ■ KVS and KVM Series ◇ Allowable maximum backpressure: The figure in the specifications includes a peak value at the tank port of the Valves valve. etc. specific functions and characteristics. precautions. it may cause an initial seizure. ◇ Contact us about the proper drain flow. (for excavators and mini-excavators)……………………………49 ※ Please read the precautions described in each chapter after page 7. KVML. Otherwise. KFP.1 MPa. it will result in poor lubrication in the housing and cause the seizure of parts. KCM. Piston Pumps. which varies depending on the condition. ■ Piston Pumps ■ PSV Series (Closed circuit) …………………………………17 ■ Closed Circuit Pump and Motor Boost Pressure ■ PSVD Series (Open circuit) …………………………………17 A closed circuit pump requires boost pressure of 0. etc. specifications.): Each product line Features (characteristics). performance curves. model names. use bolts of the right size and work on the provided flat mounting plate so as to protect the valve from the tightening torque. ■ MSG Series (with reduction gear) (for excavator and mini-excavator swing) …………………23 Precautionary Cylinder Handling ● Initial Unpacking ■ Pumps with Motors ■ HST (General) ……………………………………………………………………………29 Do not remove the plug placed on the cylinder port until you start assembling the unit.3 to 0. basic structure. ■ Pumps ■ Hydraulic Pump (General) ………………………………………………………………7 ◇ Operating the product without drain piping will raise the pressure in housing and may cause internal damage or oil leakage. ● Category (Pumps. Install a (for excavator and mini-excavator travel) ………………… 23 cavitation preventive function in the circuit to avoid such damage. ■ MAG Series (with reduction gear) ■ Piston Motor Cavitation Prevention duction gear With a motor used in an open circuit. ■ Caution on the Use of the Unit ■ Caution on the Use of the Unit ………………………………3 Higher drain pressure will shorten the life of internal parts. apply grease to the exposed rod surface once a month. Category Equipment Series Page Always keep the motor housing filled with oil. This is necessary for lubrication in reduction gears. Otherwise. and KCFL Series ………………………………36 ◇ Do not remove the plug placed on each port until it is connected to the piping. ◇ Maintain the case internal pressure below 0. etc. (Manual lever.) ■ KFP Series (Tandem) …………………………………………8 ◇ Fill the housing with oil before starting an operation. ■ PSVL Series (Open circuit. Cylinders. Smaller or longer piping will raise the internal pressure. Mount the cylinder on ■ Integrated HST ■ HVFD Series ……………………………………………………30 the prepared equipment right after unplugging it. inspect and repair damage or replace the housing. load sensing type) … … … … 17 ■ Piston Motor Back Pressure If the output port of a motor in a series. 5 6 . Precautions on Valve Handling ■ Cylinders ■ Hydraulic Cylinder (General) …………………………………………………………35 ● On Assembly ■ KCH. Lower boost pressure may cause cavitation. A careful attention is also required when viscosity is high at a low temperature. poor braking. etc. Otherwise. Contact us for permissible maximum back pressure ■ Motor units ■ MSF Series (motor unit) ……………………………………23 for each product. and Flow Restriction Properties ………………………………………………………64 <Main contents of this product guidance> Products are explained in the following order. or damage to the pump. Basic Construction [Construction and Mechanism] 1. ※ The shaft is designed to be rotated in one direction to realize high performance. ● The actual flow and actual input power are related to the speed and pressure. ● Input power (theoretical shaft power / mechanical efficiency) Operation at a high speed and high pressure increases shaft power. please specify the direction of shaft rotation: C rotation (clockwise viewing from the shaft end) or A rotation (anti-clockwise viewing from the ※ Low pulsation gear pump (KFS series) shaft end) . 2. light in weight. Symbol 7 8 . inside of the pump and render it unusable. the oil filling the gear tooth grooves is moved from the Symbol suction port to the delivery port. ■ KFP Series (Tandem) Basic characteristics ● Volumetric efficiency (actual flow / theoretical flow) Operation at a low speed and high pressure increases internal leakage causing low performance. The shaft connected to the gear is driven by an engine or an electric motor. While the gears are rotating.Pump Pump ■ KP. Please contact KYB if the properties of each model need to be clarified. The KFP series pumps having cast-iron bodies are those of high KFP23. Noise in hydraulic Note: Rotating the pump in the direction systems is generally caused by the pressure pulsation created by the pump and dual flank engagement gear technology is opposite to the design will damage the utilized for these gear pump series to reduce the pressure pulsation.KFS23 performance. When placing an order. advanced technology and excellent production technology. and durable. and KFS Series (Single) Pump: Gear pump KP05 【General Description】 High reliability is the primary policy for developing KYB pumps and is based on long experience in various applications. KFP. KFS23 series and KFS32 series are low pressure pulsation version of KFP23 series and KFP32 series. compact in design. KFP32 (Dual model) Displacement of each Model Displacement (cm3/rev) 0 20 40 60 80 100 120 KP05 KFP23 KFS23 KFP32 KFS32 KFP51 ※ Please consult KYB when selecting an appropriate gear pump model under the same displacement. 463 〜 11.358 19.000 ー ー 12.225 20.561 17. and rear pumps have separate suction ports.188 〜 31.842 KFS32 20. however. center (in the triple model).0 20° 12 12 2.078 KFS23 16. Pump Pump 【Caution to specify a tandem pump(Dual or Triple)】 Dimensions (unit: mm) ● Two or three pumps are driven with a single shaft.2 ＋ 0.037 23.3 0 KFP23 ＋ 0.5 0 14 ＋ 0.080 24.092 18.505 〜 KFP51 12/24 14 29.329 13.500 14.300 21.229 〜 21.4 KFS32 ＋ 0.742 11.3 0 8 0 9 10 .134 〜 16. and TC): Simple expression to obtain allowable shaft torsional torque For dual model:（QF × PF）＋（QR × PR）≦ TT QF : Front pump displacement (cm3/rev) （QR × PR）≦ TR PF : Front pump pressure (MPa) QC: Center pump displacement (cm3/rev) For triple model:（QF × PF）＋（QC × PC）＋（OR × PR）≦ TT PC: Center pump pressure (MPa) （QC × PC）＋（QR × PR）≦ TC QR: Rear pump displacement (cm3/rev) （QR × PR）≦ TR PR : Rear pump pressure (MPa) TT. the maximum operating pressure may be applied.028 24.400 〜 14 22. and TR values ■ KFP23/KFS23 Coupling hole unit: mm ● Spline: L T o o l Direct drive without flexible Drive with flexible coupling No.970 〜 KP05 Module 1.27 5 KFS23 ＋ 0. followed by the center pump.020 〜 13.030 22 6 0.018 ＋ 0.028 ＋ 0.342 〜 31. ● Specifications of each pump are the same as the single pump. and finally the rear pump.634 3.539 ● Straight: M Model Ｄ Ｌ Ｈ Ｒ ＋ 0.750 〜 24.015 KP05 12.430 27. of Model Ｄ．Ｐ pressure P.588 22. the torque value (T value) in the following Q x P formula should not be exceeded.329 24.02 23.041 18.592 11. TC.716 24.25 〜 0.958 〜 18.036 KFP51 30 ＋ 0.1 ＋ 0.912 17.D ｄ ｄＨ coupling Teeth angle Ｈ Ｄ Ｈ Ｄ 12. ● Set the displacement volume as follows: Front pump ≧ Center pump ≧ Rear pump ● When only the front pump is operated.521 〜 22.8 ＋ 0. 【Basic construction of tandem pump (dual model)】 ■ KPO5 ● Supply hydraulic fluid from the single reservoir.1 4 0.589 〜 24. ※ With a triple-pump model.811 〜 30° 13 20.504 16.050 〜 12.007 0 0 ＋ 0.463 〜 17. the pump nearest the shaft is the front pump.743 19.700 〜 18.666 16/32 2.048 〜 10 15. When multiple pumps are loaded simultaneously.636 〜 11 17.465 〜 11.875 KFP23 14.657 27.030 ＋ 0.C. ※ For clockwise rotation (C).03 21. TR.2 ＋ 0.827 18.000 〜 10.961 〜 23.005 0 0 KFP32 ＋ 0.15 ＋ 0.007 30.407 32.812 〜 17.137 14.261 16.463 16.255 31.067 〜 13. ※ The mirror image applies to the anticlockwise rotation (A) <Q x P expression (T value)> ※ T values (TT.638 KFP32 19.147 13.267 〜 23.020 10.287 〜 19. even if the front.834 〜 17.225 〜 16. 6 ＋ YR ◇ KFP32 tandem (dual) pump is available. ◇ Tandem models and tandem combination with KFP23 and KPO5 series are possible.B and C (See Table 1. ※ Formula to calculate A.0 ＋ YR (2) If KFP2323 or a larger pump is used as a front pump A ＝ 149. flow rate is less than 190 l/min. ◇ When the max flow rate is less than 100 l/min. common suction port on the front unit can be used. YR = Rear pump Y length. the ◇ Tandem (dual) model and tandem combination with the KFP23 series is possible.1 ＋ YF ＋ YR B ＝ 63.) YF = Front pump Y length.1 ＋ YF ＋ YR B ＝ 67. B and C (See Table 1.5 ＋ YF ＋ YR B ＝ 91. 11 12 . (1) If KFP2319 or a smaller pump is used as a front pump A ＝ 141. ■ KFP51 ■ KFP32 Tandem ※ For anticlockwise rotation (A) The mirror image applies to the clockwise rotation (C). ◇ When the max.Pump Pump Dimensions (unit: mm) ■ KFP23 Tandem ■ KFP32/KFS32 ※ Formula to calculate A.8 ＋ YF C ＝ 56.8 ＋ YF C ＝ 52.4 ＋ YF C ＝ 72.the common suction port on the front unit can be used.0 ＋ YR ◇ KFP23 tandem (dual and triple) are available.) YF = Front pump Y length YR = Rear pump Y length A ＝ 191.. ■ KPO540 ■ KPO5123 ■ KFP3228 ■ KFP3256 ■ KFP2319 ■ KFP2333 ■ KFS3236 ■ KFS3252 ■ KFS2320 ■ KFS2333 ■ KFP5163 ■ KFP51100 13 14 .Pump Pump Performance Curve (Hydraulic fluid: ISO VG32. oil temperature: 50℃ ) ※ The typical displacements of models of each series are illustrated. Please consult us for models of other displacements. The suction port and delivery port are divided by 【Variable Displacement】 the valve plate. All rotary parts are manufactured by one of KYB’s affiliated companies. In the open circuit. pump may be used as a charge pump in the Single flow type ■ Pressure and flow characteristics ■ LS Control characteristics closed circuit as well. 2. pressure increases internal leakage decreasing volumetric efficiency. and is equipped with additional pump functions. Takako Industries. a split flow type pump has two independent delivery Split flow type cylinder Valve systems with alternately positioned ports on block with each port plate a single cylinder block. The pump swash plate angle (and pump displacement) fluctuates so that ■ Volumetric efficiency. The pump delivers the required flow to the actuator at required ● Volumetric efficiency (actual flow rate / pressure. With the variable displacement pump. 3. oil is delivered to the valve Main Functions and actuator side. high-reliability piston pumps developed on an abundance of 2. In the closed circuit.Triple） 】 efficiency) and actual shaft power are ● Two or three pumps are driven with a single related to the speed and pressure. This catalog provides only changing the pump tilt angle to + α . The input shaft connected to the driving power actuator are controlled with the switching and spool opening of source rotates. The third volumes of each model. a single pump can connect to and control bores in a movement determined by the swash multiple actuators. changed only in the +α direction. The piston characteristics of individual displacement pump is used to drive travel motors.Pump Pump Closed Circuit and Open Circuit Pump: Swashplate type piston pump ● Closed circuit 【General Description】 1. The pump and the motor can be put into one case and made into a Basic Construction compact size as integrated HST. input horsepower. the pump the cylinder block and the input shaft is made by controls the flow rate and the swash-plate tilting angle can be the spline. and the pump flow change accordingly. Flow rates in the first and second Please contact us regarding the specific pumps can be set independently. agricultural machines. Inc. thereby making constant the maximum input torque to the pump. 4. ● The actual delivery flow rate (volumetric 【Tandem pumps（Dual. the delivery side and suction depending on the pump delivery pressure in order not to exceed the engine side are reversed as the swashplate tilting angle horsepower. no sufficient flow and less heat generation can be made. and the returning oil from the actuator is flown to the reservoir. and other industrial equipment in a wide and a pump. When the angle is The regulator for the control of the swash plate angle of an open circuit pump has the 0. plate’ s tilting angle. the greater the reciprocation stroke <Regulator> (displacement) of the piston. (PSVD) <Split flow> split into internal and ※ A single cylinder block with a two flow external ports for ※ It is possible to control the flow rate almost system separate delivery P1: First pump pressure P2: Second pump pressure Pg: Gear pump pressure proportional to the pump rotating speed. pressure increases mechanical efficiency. ● Horsepower control: The swash plate angle (and the pump displacement) changes 2. a typical piston pump is a single flow type with one suction port and one delivery port. which generates energy-saving system. Then. In the open circuit. With a fixed-displacement pump. 4. ● Open circuit The direction of rotation of the input shaft is fixed. which is the world’ s leading 3. Then. So does the connection between the control valve. ● Actual horsepower (theoretical horsepower / mechanical efficiency) In the tandem configuration. the speed and direction of an 1. The speed and direction of the actuator can be decided by experience in numerous applications. and in utilizing the engine horsepower efficiently. reducing following control devices: the discharge volume to zero. plate.) 1. When the pistons are pulled out from the cylinder block. When the pistons are pushed in. The closed circuit features a smooth starting and stopping of the company in this technology. the second pump is An operation at a higher speed and higher connected with coupling in the axial direction. The pump displacement can be changed by external control of the swash-plate tilting PSVD <Variable displacement pump> angle. On the other hand. They are manufactured by advanced production systems. and theoretical flow rate) differential pressure between the upstream and downstream sides of the LS valve mechanical efficiency An operation at a low speed and high can remain constant. 15 16 . The greater the tilting angle of the swash ● Manual type: The swash plate angle is controlled with a lever link. (PSVD) Basic characteristics ● Load sensing control: This control aims to deliver the required flow that matches the When selecting the pump. effective in preventing the engine from stalling due to the pump power consumption exceeding the engine power. This control is direction of the input shaft remains unchanged. ongoing operation. oil is drawn by the pump from the reservoir. The closed hydraulic circuit is constructed with an actuator (motor) KYB’s piston pumps are used for construction equipment. All series are high-performance. <Tandem dual configuration (single flow)> cylinder block Valve plate (horsepower control characteristics) (PSV2) 【Single flow and split flow】 ● As described in the basic construction of the piston pump. and PSVL shifts from +α to −α even though the rotating ultimately making constant the pump’ s horsepower consumption. examine the following characteristics. 1. (A two-way delivery flow in the closed circuit. [Construction and Mechanism] 2.. ※ This piston pump has the same basic structure with the piston motor. oil is drawn from the reservoir. the pistons reciprocate along the cylinder 3. the reciprocation of the piston stops. actuator. variety of market sectors. or to – α as the delivery port piston pumps for general-purpose closed circuit applications and construction equipment open circuit applications. input shaft. P4 Pressure port G1/2(PF1/2) B1 Pilot port G3/8(PF3/8) B2 Charge port G1/2(PF1/2) S Suction port G3/4(PF3/4) T1 Case drain port G1/2(PF1/2) 17 18 . Typical piston pumps are variable and high-pressure types mainly used for construction equipment. (See Page 49. etc. They are widely used in ■ PSV-10 (single) areas that require horsepower control.) ※ Only CW type is available (clockwise when viewing from the input shaft ■ PSV2-16 (tandem) side).P4 Pressure port G3/8(PF3/8) B1 Pilot port G3/8(PF3/8) B2 Charge port G3/8(PF3/8) S 1 Suction port G3/4(PF3/4) T1.P2.P2.T2 Case drain port G3/8(PF3/8) ※ Load sensing type variable displacement pump ※ Use together with a load-sensing (LS) valve.P3. Please specify either "CW" or "CCW" as the direction of rotation. <Closed circuit> engaged in heavy-duty work.P2 Pressure port G1/2(PF1/2) S Suction port G1/2(PF1/2) T Case drain port G3/8(PF3/8) ■ PSV Series (Closed circuit) ■ PSV-16 (single) ※ The direction of rotation of the input shaft is to be set in one direction. PSV2-16 Hydraulic circuit Ports P1.P3.Pump Pump Dimensions (unit: mm) Pump: Piston Pump ※ PTO shaft (option) is shown in the pump unit outline drawing. PSVD2-21 Hydraulic circuit ■ PSVL Series (Open circuit and load sensing) Ports P1. Hydraulic circuit Ports P1. load-sensing. PSVL-42 Hydraulic circuit Ports P1.P2 Pressure port G1/2(PF1/2) B1 Pilot port G3/8(PF3/8) B2 Charge port G3/8(PF3/8) ■ PSVD Series (Open circuit) S Suction port G1/2(PF1/2) T Case drain port G1/2(PF1/2) ■ PSV2-10 (tandem) ※ Only CW is available (clockwise when viewing from the input shaft side). and other control functions. (See Page 55. remains constant. 17.Pump Pump <Open Circuit> <Open Circuit> ■ PSVD2-13.) <Open Circuit: Load sensing> ■ PSVL-42 ■ PSVL-54 Hydraulic circuit Performance Curve Operating oil: ISOVG46 Oil temperature: 50℃ <Closed circuit> ■ PSV-10 ■ PSV-16 <Load sensing system working mechanism> (multiple operations) ● The maximum load pressure Pls is selected by the shuttle valve. enabling multiple operations under different loading conditions. which controls the pump regulator and the pressure compensator valve. ● The pressure compensator valve adjusts the flow at Ac so that PC upper stream pressure equals (Pls + β ) ● Differential pressure (Pp-Pc) between the uppersteam and downstream sides of A1 and A2. 19 20 . which control the flow to each actuator. 21 and 27 [Split flow (Single cylinder block with two flow systems)] ■ PSVD2-13 ■ PSVD2-17 Hydraulic circuit ■ PSVD2-21 ■ PSVD2-27 ■ PSVL-42 and 54 [Load sensing] ※ To be used with an LS valve. ] D ηv: Volumetric efficiency ○ The speed can be decided by motor capacity. ● Two speed mechanism (standard component for all models): Two step speed change can be done under the same flow. ● Anti-cavitation valve (with no relief mechanism) (standard component for MAG-18 through 33): This valve has stopping performance similar to the shockless version and can prevent cavitation. pressure. T= ×ηm P: Effective pressure [MPa] 4. When high-pressure oil supplied from the pump ◇ Motor (standard component for all models) flows into the cylinder block through the valve ● Shockless relief valve: Reduces shocks at the stop and prevents cavitation. which allows a wider range of speed control. (Output torque ratio over 100%) the piston assembly. ○ Volumetric efficiency is affected by leakage inside the motor (from the high pressure side to the low pressure side). ● Anti-reaction valve: Reduces the reaction at the time the motor stops. and the torque is transmitted to the shaft The motor’ s general characteristics (performance) through the spline. The piston assembly receives reaction force (Optional Components for All Models) against it and produces reaction force in the ● Parking brake delaying valve: Delays the response time of the parking brake rotating direction.Motors Motors 【Main Components of the Travel Motor (MAG)】 ◇ Reduction gear ● A case rotation type simple planetary reduction gear is adopted. (See Page 24) ● Shockless relief valve (standard component for MAG-50 through 230): Reduces shocks at the stop and prevents cavitation. [Construction and Mechanism] ● Motor lubricant circulation system: Hydraulic fluid is also used as a reduction gear lubricant. Hydraulic circuit ■ Swing motor (with reduction gear) 【Characteristics of the Shockless Relief Valve】 Hydraulic circuit 21 22 . and volumetric efficiency. the swash plate is pushed by the force of ● Parking brake: Multiple-plate disk brake is adopted. D: Motor displacement [cm3/rev] 3. No maintenance is required. The inlet and outlet sides can be switched by an 2 ×π ηv: Mechanical (torque) efficiency external valve operation to rotate the motor in the reverse direction. ■ Traveling motor (with reduction gear) Output speed calculation formula: Q × 103 N: Speed [rpm] N= ×ηv Q: Flow rate [L/min. and mechanical efficiency. The oil delivered from the outlet port returns to T: Output torque [N-m] P×D the reservoir through the valve plate. ○ Output torque can be obtained from motor displacement. 1. and drops at a higher speed and lower pressure. resulting in the rotation of the Output torque calculation formula: are as follows. ● Make-up valve: Prevents cavitation. ○ The torque efficiency is affected by mechanical friction and other factors. The valve is effective to prevent cavitation. 【Main Components of the Swing Motor (MSG)】 ■ Motor unit ◇ Reduction gear ● Shaft rotation type planetary reduction gear is adopted. ● Parking brake (standard component for MAG-50 through 230 and optional for MAG-12 through 33): A multiple-plate wet disk brake system is adopted. plate. and decreases at a slower speed and higher pressure. ◇ Motor (standard component) ● Counterbalance valve (standard component for all models): Prevents the motor from overrunning on a down slope. Motor: Piston Motor (Swash plate type) (Optional Component) ● Automatic two-speed system (except for MAG-12): Speed is automatically switched from Low to High or vice versa Basic Construction according to travel load pressure. shaft. 2. flow rate. The total force of high-pressure side piston assembly produces a rotating force in the cylinder Basic Characteristics block. ■ MAG Series (with reduction gear) MAG-33V ■ MSF-23 (motor unit) Models for winches and skid-steer loaders are also available. which has been used for construction and 1st Speed : Low speed (high torque) 2nd Speed : High speed (low torque) agricultural machines. and can be tilted by external 【Swash Plate Piston Motor】 pilot pressure with two steel balls at the rear of the swashplate working as fulcrums. a case rotation planetary reduction gear and a swash plate piston motor. The MSF series is a compact. block side. The two-speed change mechanism supports the ■ MSF-18 (motor unit) automatic speed change according to the load. and is equipped with a two-speed Dimensions (unit: mm) change unit and a parking brake unit. (2nd speed). Takako Industries. As a result. The MAG series offers high-torque motors for medium. The motor is equipped with a parking brake in our standard version. the Switching the variable valve position to 2nd speed with the Motor: Piston motor (with reduction gear) variable valve connects the swash plate control piston chamber control valve leads the motor driving pressure to the swash behind the swash plate with the reservoir and the section“a”of plate control piston. a. Low speed = Large displacement High speed = Small displacement When the control valve position is switched to 1st speed.Motors Motors 【Two-speed Change Mechanism】(MAG series for travel systems) Motor: Piston Motor Unit The swashplate has three surface sections. Inc. Please contact us for details. . and c. which is the world’s leading company in this technology. generate a smaller displacement.. the swash plate tilts at a maximum making the swash plate tilt at a minimum angle β to or high-speed traveling crawler vehicles. The MSG series motors incorporating a shaft-rotation type simple planetary reduction gear and the swash plate motor are ideal solutions for the swing system of excavators and mini-excavators. Please contact us for details. light. As the force of the piston overcomes the swash plate is pressed against the fixed face by the driving the driving force of the motor and the force of the spring. swashplate type piston motor. MAG-170VP ■ MSG Series (with reduction gear) MSG-27P 23 24 . ■ MSF Series (motor unit) MSF-23 Models for fan and mixer drum driving applications are also available. All rotary parts are manufactured by one of KYB-affiliated companies. b. force of the motor on the piston and the spring on the cylinder the face“b”of swash plate is pressed to the fixed face. It consists of angle α to output a larger displacement (1st speed). (Mounting screw X) Connecting flange (Z): Sprocket mounting P. (Mounting screw W) ■ MAG-170VP and 230VP (for travel) Precautions for handling MAG/MSG series ◇These series are designed for excavators and mini-excavators with open circuit.V) MAG-50VP-800 58 23 50 48 71 G1/2(PF1/2) G3/8(PF3/8) G1/4(PF1/4) 12-M16 12-M14 250 300 (W/R. 26V.C. Please contact us with any questions. (Mounting screw X) Connecting flange (Z): Sprocket mounting P. MAG-230VP-6000 87 37 89 113 G1(PF1) G1/2(PF1/2) G1/4(PF1/4) 20-M24 24-M20 425 495 Mounting flange (Y): Vehicle mounting P.D.V) MAG-50VP-800 284 210 265 332 354 145 80 70 64 (W/R. (Mounting screw W) ※ SH port: Signal pressure port for a model with an optional parking brake delaying valve mechanism. 33V.C. ◇ Do not use the parking brake of MSG motor for dynamic braking.5 130 123 76 MSG-27P-16E 240 163.V) Model A B C E F Main port Drain port Pilot port W X φY φZ MAG-18V-230F 46.D.C.C. Configure the circuit so that the parking brake applies after Model A B C E Main Drain port Pilot port W X φY φZ the motor stops.C.V) Mounting flange (Y): Vehicle mounting P.D. Please let us know what Model φ D1 φ D2 φ D3 φ D4 L1 L2 L3 L4 L5 your application requirements are.V) MAG-33V-550F 264 200 230 286 296 128 68 50 43.V) MAG-33V-650F 54 22 45 41 71 G1/2(PF1/2) G3/8(PF3/8) G1/4(PF1/4) 12-M14 12-M14 240 262 (W/A. MAG-170VP-3800G 370 300 402 469 526 254 99 128 131 ◇ MAG motor is to be installed with its output shaft horizontally positioned and the main port facing sideways or upward. port MAG-170VP-3800G − 54 95 110 G1(PF1) G1/2(PF1/2) G1/4(PF1/4) 30-M16 22-M16 340 440 ◇ Please read the“Precautionary on the Use of Hydraulic Equipment”on Page 4.C.D.C.5 (W/A.5 G1/4(PF1/4) G1/4(PF1/4) G1/4(PF1/4) 8-M10 8-M10 155 155 Mounting flange (Y): Vehicle mounting P.Motors Motors Dimensions (unit: mm) ■ MSG-27P-10E and 16E (for swing) ■ MAG-12V (for travel) Model L1 L2 L3 L4 L5 MSG-27P-10E 208 131. Do not install MSG motor with the output shaft facing downward.V) MAG-18V-350F 54 22 45 41 71 G1/2(PF1/2) G1/4(PF1/4) G1/4(PF1/4) 11-M12 11-M12 192 215 (W/A.C.5 162 155 83 Output shaft pinion Tool Model φ D1 φ D2 φ D3 φ D4 L1 L2 L3 L4 L5 Model Module No.D.C. MAG models are also available for closed circuit travel motors and winch applications.V) MAG-26V-400F 215 165 204 255 288 120 70 46 41.V) MAG-18V-350F 215 165 190 238 263 115 50 48 41. It should not be substituted with the vent port.5 39 37 54. (Mounting screw X) Connecting flange (Z): Sprocket mounting P.C.D. of Teeth pressure MAG-12V-120E 179 140 140 177 205 95 45 50 51 angle MSG-27P-10E 5 11 20° MSG-27P-16E 6 11 20° Model A B C E F Main port Drain port Pilot port W X φY φZ MAG-12V-120E 43 16.D. (Mounting screw W) ■ MAG-85VP (for travel) ■ MSG-50P-21 (for swing) Model φ D1 φ D2 φ D3 φ D4 L1 L2 L3 L4 L5 MAG-85VP-1800E 350 290 324 394 387 180 83 89 107 MAG-85VP-2400E 400 330 365 437 713 200 100 75 93 Model A B C E Main port Drain port Pilot port W X φY φZ MAG-85VP-1800E 71 28 84 108 G3/4(PF3/4) G1/2(PF1/2) G1/4(PF1/4) 16-M16 15-M15 320 364 MAG-85VP-2400E 71 28 84 108 G3/4(PF3/4) G1/2(PF1/2) G1/4(PF1/4) 16-M16 22-M16 370 405 Mounting flange (Y): Vehicle mounting P.5 40 37 58 G3/8(PF3/8) G1/4(PF1/4) G1/4(PF1/4) 13-M10 12-M10 170 180 (W/A.5 (W/A.5 (W/A.C.5 19.V) MAG-26V-400F 54 22 45 41 71 G1/2(PF1/2) G3/8(PF3/8) G1/4(PF1/4) 9-M12 11-M12 192 232 (W/A.C. use the upper one out of two drain ports. When MAG-230VP-6000 462 380 450 530 613 313 112 157 171 the main port is set facing sideways.C. (Mounting screw X) Connecting flange (Z): Sprocket mounting P.C.D. and 50VP (for travel) ■ MSG-27P-23E (for swing) Model φ D1 φ D2 φ D3 φ D4 L1 L2 L3 L4 L5 MAG-18V-230F 190 150 160 200 250 104 40 59 61 (W/A. (Mounting screw W) 25 26 . ■ MAG-18V. ◇ We may recommend motor capacities and speed ratios suitable for the customer’ s requirements. Please contact us for details. Also use the specific drain port.C.C. Motors Motors Performance Curve Operating oil:ISOVG46 Oil temperature: 50℃ <Motor unit> ■ MAG-170V ■ MAG-230V ■ MSF-18 ■ MSF-23 <Motor with reduction gear for travel> <Motor with reduction gear for swing system> ■ MAG-12V ■ MAG-18V ■ MSG-27P-10E ■ MSG-27P-16E ■ MAG-26V ■ MAG-33V ■ MSG-27P-23E ■ MSG-50P-21 ■ MAG-50V ■ MAG-85V 27 28 . etc. ◇ Can be mounted on to a manual type HST.Output speed Standard neutral mechanism allowing a relatively large neutral width. 29 30 . and smaller in size than mechanical transmissions installed on automobiles. ● Servo regulator This component features the following advantages: ◇ Low operation torque allowing an easy operation and lower noise caused by link vibrations. snowplows. HST is smoother in operation travel requirements for tractors. 【Option】 ● Charge pump When the charge pump is used together with an oil hydraulic unit installed on the vehicle. 【Light and Heavy duty Models】 ● Light duty models: Suitable for the travel system of vehicles that serve light load work such as lawn mowers and combine harvesters. allowing a stable neutral width. ① Theoretical output speed: (Pump displacement)/(motor displacement) × (Input speed) ② Actual speed: (Theoretical output speed) × (Volumetric efficiency) ③ Theoretical output torque: (Motor displacement) × (HST load pressure) Main Mechanism ■ Servo Regulator 【Neutral mechanism】 ■ Servo Regulator (Manual Operation) [SL] (Electric Control) [EL] ● Orifice Lever operation torque characteristic Ampere . ■ HVFD Series Integrated HST (Pump & Motor) Basic Construction ● HVFD18F-R35 Circuit example HVFD28V37 Basic Characteristics ■ Output Horsepower characteristic ■ Output Speed ■ Output torque characteristics characteristic ※ The direction of rotation of the pump input shaft can be set in either the CW or CCW direction for HVFD10 Series only. combine harvesters. This unit is designed to meet the vehicle circuit enabling continuous speed change from Forward to Stop/Neutral and Reverse or vice versa. ● Movable thrust plate HVFD37F-R35-SL example characteristics This method is less affected by the given conditions such as the input speed and oil temperature. It can be combined with electronic control or servo functions. select the charge pump displacement approximately 25% of the HST pump. Please specify the type: either CW (clockwise) or CCW (counterclockwise) for another series. when ordering.HST HST Integrated HST (Pump and Motor) HST stands for Hydrostatic Transmission and is used in a travel system to connect the hydraulic pump with the motor in a closed Integrated HST enables an easy combination of a speed reducer and a transmission. up to 18kw or smaller. ◇ Good responsiveness and a stable neutral characteristic. ◇ The fail-safe mechanism is included as a standard accessory for automatic return to the neutral position in case of a hydraulic power source failure or link connection failure. ● Heavy duty models: Suitable for the travel system of vehicles that serve moderate load work such as tractors and combine harvesters with engine horsepower of 18 to 59kw. This is superior to the orifice method in neutral zone stability and adjustability of the neutral point. HST HST Dimensions (unit: mm) ■ HVFD23F ■ HVFD10F Hydraulic circuit Hydraulic circuit ■ HVFD18F ■ HVFD28F Hydraulic circuit Hydraulic circuit ■ HVFD21F ■ HVFD37F Hydraulic circuit Hydraulic circuit 31 32 . N18 ■ HVFD21F-R18.R23 Hydraulic circuit <HST: Heavy load model> ■ HVFD18F-R35 ■ HVFD23F-R35 ■ HVFD37V50 (two-speed) Hydraulic circuit ■ HVFD28F-R35 ■ HVFD37F-R35 <HST: Two-speed motor type> ■ HVFD28V37-R35 ■ HVFD37V50-R35 33 34 .HST HST ■ HVFD28V37 (two-speed) Performance Curve Operating oil: ISOVG46 Oil temperature: 50℃ <HST: Light load model> ■ HVFD10F-N15. ) please contact us.5-2. (Single -acting cylinder. corrosion-resistance and surface strength against ④ When designing a hydraulic circuit. capability to ● The stroke of the cylinder to which retraction load is applied is restricted by the buckling strength.6-0. and the fluid on the bottom side → returns to the reservoir. calculate the tank return-side flow rate using the following formula: ■ Main Features of the KCH and ■ Cushion Mechanism for Cylinders √2 Δ ρ P Flow rate Q[L/min] = 60CA Then go back to the above formula and calculate the velocity based on the KCM Series return-side cylinder area. operate at a low speed until the air is ● As the piston approaches the stroke end. care must be taken not to cause a great impact on it when stopping it.Cylinders Cylinders Cylinder: For construction equipment and industrial vehicles ■ KCH. lightweight. nickel-chrome plating to improve wear.and ③ For protection and safety of the cylinder. Load direction <Calculating Thrust > KCM ● Theoretical thrust D: Cylinder bore (mm) P: Pressure (MPa) Extension thrust F1 N= π/4・D2 × P d: Rod diameter (mm) Q: Flow rate (L/min. and the fluid on the rod side returns to the reservoir. protecting them from dirt and dust. ③ Avoid negative pressure inside the cylinder during the operation because cavitation may cause malfunction. lightweight.) Retraction thrust F2 N= π/4・(D2-d2) × P ● Actual thrust: To be obtained by multiplying the above theoretical thrust value with the coefficient η (0. KCM. KYB enhanced its seal’ s durability by developing and evaluating seals and sealing systems in-house. etc. and forklift truck applications [Basic Construction and Calculation Formula of Hydraulic Cylinder] <Single-acting cylinder> <Double-acting cylinder> KCH [Construction and Mechanism] 1. but the value may be significantly affected by the flow control with the valve return-side restriction (meter-out) depending on the load direction and pressure.7) A: Valve restriction (opening) area (mm2) ΔP: Pressure difference before and after ● Compact. pay attention to return flow rate increase at cylinder retraction. compressed oil reduce (See Page 61 for additional valves. and KCFL Series For excavator. and strong restriction (MPa) : Hydraulic fluid density (kg/m3) KYB has developed its compact.) C: Flow coefficient (0. and manufacturing and inspection Wa (allowable retraction load (at full extension: N)) = Pk (buckling strength N) / S (safety ratio: typically 1.95 for vehicle) <Calculating velocity> Q ● Extending velocity V1［m/min］= × 103 π /4・D2 KCFL Q ● Retracting velocity V2［m/min］= × 103 π /4・（D2 ーd 2） ※ Flow rate Q is calculated using the pump’ s delivery flow (meter-in). [Precautions for operation] ● Piston rod Piston rod sliding surfaces are treated with ● Speed induction hardening and protected with hard ① A speed exceeding 60 m/min affects the durability of the cylinder with standard specifications.5 m/min will affect performance (particularly vibration performance). ● Consider installing a cylinder support and linkage mechanism to avoid thrust load on the cylinder. and various valves such as ● Starting operation hose rupture and slow return valves if required. Please install a cushioning device to reduce the stroke end shocks. 35 36 . 2.5 or technologies enabling high quality product more) production. Since the value will vary depending on the support mechanism (whether the load is supported by the rod only or the ● Seal tube as well. Please contact us when a low ● Safety precautions speed operation is expected. ① Remove air inside the cylinder completely when starting an operation. scratches. ⑤ Operation slower than 0. and optimizing the oil film.) removed completely. ② A rapid pressure rise while air remains in the cylinder may damage/burn the seal due to a so-called diesel effect (abnormal ● The cushioning device can be installed on either the rod or air temperature rise caused by isentropic compression). The pressurized hydraulic fluid from the rod port retracts the cylinder. chromium plating for engineering purposes or ② Install a cushion device for equipment protection and safety if a stroke end speed consistently exceeds 18 m/min. in-house test systems. and durable cylinders based on their long marketing <Buckling strength and stroke> experience. mini-excavator. The pressurized hydraulic fluid through the bottom port extends the cylinder rod. shocks at the stroke end. In such case. design products according to its strength and An approximate value of the buckling load is obtained from the following formula: fatigue analysis. bottom side of the cylinder or on both ends. If air remains. 70.100. Please contact us for details.70.90. 145 90.55 800 530 G1/2(PF1/2) 90 50.) 115 60 58 70 125 70 40 500 400 G3/8(PF3/8) 120 75 65 90 165 75 40.55 800 530 G1/2(PF1/2) 95 55.2 27.95. piston portion length B.75 1000 800 G1/2(PF1/2) 37 38 .60. ● See the opposite page (p. Please contact us for details.90. ● When different sizes on clevis widths of the rod heads and caps and pin diameters are required.8 φ 26.5 105 70 62 85 155 The drawing shows the 140 90. and the port position and size when installing depend on customers request.95 1700 1350 3/4 or 1 1 57.105 1900 1530 3/4 or 1 1-1/4 66.100 1700 1350 3/4 or 1 3/4 50.85 1400 1250 1/2 or 3/4 ■ Cap dimensions 120 80. 90 50 50 70 80 tube.105. 95 60 55 70 75 100 60 55 75 80 Retracted 105 60 55 75 80 Cylinder bore Rod diameter Max length L Port size J φD φd stroke 110 65 58 75 85 (min.Cylinders Cylinders Dimensions (unit: mm) Dimensions of the Rod Head and Cap ■ KCH Series (for excavator) ● Standard clevis dimensions for KCH/ KCM series are shown as follows.70 1100 1250 1/2 110 110 100 140 135 100 70 1100 1250 1/2 or 3/4 105 70.65 900 530 G1/2(PF1/2) 105 55.95. 80 75 70 105 95 85 85 75 95 95 <Port sizes> 90 85 75 95 90 Retracted 95 85 83 105 105 Cylinder bore Rod diameter Max 100 85 105 120 110 length L Port size J φD φd stroke (min.100.75 1200 1250 1/2 or 3/4 110 70.38) for standard sizes of a rod head and a cap.7 31.65.95 1600 1350 3/4 or 1 1/2 40.2 φ 13.70 900 750 G1/2(PF1/2) 115 65. 85 60 55 70 75 ports on the cylinder ● See the opposite page (p. 140 75 75 120 185 145 90 85 120 150 150 85 85 130 190 ● With port on cap φD φP E M G ※ KCM only 70 40 36 55 60 Please contact us 75 50 45 60 65 【Note】 regarding the position 80 50 50 60 80 ● The cylinder head portion length A. piston portion length B.8 φ 22 M12 × 1.5 M14 × 2 115 70 70 95 170 KCM has the standard 150 95. However.75 110 65 65 95 170 KCH series dimensions.8 23.50.80 1200 1250 1/2 or 3/4 115 80.75 1000 750 G1/2(PF1/2) 120 65. and the port position depend on 65 60 60 85 85 customers'request.70 900 700 G1/2(PF1/2) 110 60. please contact us.25 ※ KCH and KCM 100 60 55 85 136 135 90.5 18.5 M10 × 1.60. 38) for standard sizes of a rod head and a cap. 70 65 62 98 88 ● Cylinder bore D greater than the figures in the table below are also available. the 75 60 68 90 95 construction of those models may be slightly changed.60.50 700 400 G3/8(PF3/8) 85 45.65 900 530 G1/2(PF1/2) 100 55.65.110 1900 1530 1 or 1-1/4 120 60 70 95 175 PF (O ring boss) port. 125 65 70 95 165 Please contact us when 130 75 70 110 170 an SAE flange port is 135 65 70 105 150 ■ KCM Series (for compact excavator) required.90 1500 1300 3/4 or 1 130 85.75.85 1400 1250 1/2 or 3/4 φD φP E M G Port size a b c Screw size ● With port on cap 95 50 55 70 110 125 85.) 105 90 85 120 125 95 65. The port shape is equivalent to an SAE high pressure flange.45 600 400 G3/8(PF3/8) 80 45. ■ Rod head dimensions φd φP E M G ※ KCH and KCM 40 35 39 50 60 45 40 42 60 60 50 45 50 70 75 55 50 50 70 75 【Note】 60 50 55 70 80 ● The cylinder head portion length A.5 M8 × 1.8 φ 17.75 1000 800 G1/2(PF1/2) 125 70. ) ■ Main Features of KCFL Series ● Small diameter. ● Seal…Seals made by KYB are utilized for smooth motion and prevention of internal leakage. e1.5 G3/4(PF3/4) ● The cylinder head length A and piston length B depend on customer's request. flow control valves single-acting cylinder with a small diameter and light to control a lowering speed. e1.) masts employs a hollow ram for lighter weight and easy lubrication. 61. 65 90 ● KYB's standard models are of the internal drain type. φ f2. L2 for the second cylinder of 2-stage mast. ● Contact us for mounting part dimensions: φ f1. A cushion mechanism may be built in each cylinder 85 to reduce shocks at the time of retraction. e1. and e2 39 40 . Visibility can be improved due to no drain hose. (KCFL2 extends after KCFL3 extends. ● The cylinder head length A and piston length B depend on customer's request.Cylinders Cylinders ■ KCFL Series (for forklift truck) Dimensions (unit: mm) KCFL series cylinders are designed to fit forklift truck masts and be adequate for lifting work. L2. and e2 ● J1 port is connected to J port on KCFL3. and e2 ■ KCFL2 (for the second cylinder of the 2-stage mast) Standard φD φd C J1 J2 stroke 30 G3/8(PF3/8) 65 45 32 G1/2(PF1/2) G1/2(PF1/2) 35 67 1000 〜 2500 38 50 68 G1/2(PF1/2) 40 G1/2(PF1/2) 55 42 68. φ f2. and 62 for additional welding technologies. Please contact us for details. 65 50 ● Safety/shock absorption … A down safety valve may be 70 added to ensure safety in the event of piping rupture or 55 75 other accidents. Please contact us for details. which may bring the cylinder to a complete G1/2(PF1/2) 500 〜 1300 80 60 stop. ● Contact us for mounting part dimensions: φ f1. Three types (L1. The second cylinder for 2-stage valves. and high strength…Cylinders ● Special valves for forklift truck use…Low energy for forklift mast applications are designed to fit the mast consumption type valves (KVMF series) to enable a ■ KCFL3 (for the first cylinder of 2. 58. The precise and safe forklift operation. and down safety valves are weight has been achieved by a thinner tube and special available. Please contact us for details. φ f2. (See pages 49. and L3) are available for three mast types. ■ KCFL1 (for the second cylinder of standard and 3-stage mast) ● KCFL series lifting cylinder types L1 for the second cylinder of standard and 3-stage mast. ● Contact us for mounting part dimensions: φ f1. and L3 for the first cylinder of 2/3 stage full free mast ■ Forklift truck mast mechanism and lifting cylinder (1) 2-stage standard mast (2) 2-stage full free mast (3) 3-stage full free mast Standard φD φd J stroke 45 35 G3/8(PF3/8) 50 40 G3/8(PF3/8) 55 1000 〜 2500 45 G1/2(PF1/2) 60 65 50 G1/2(PF1/2) ● The cylinder head length A and piston length B depend on customer's request. <Down safety valve installation circuit example> ● Tube…The inside wall is finished with roller burnishing for smooth motion and high durability. ● Rod…The surface is hard-chromium plated for engineering Standard purposes (nickel-chromium plated for special specifications) φD φd J stroke for rust proof and wear resistance.and 3-stage mast) mechanism with small diameters and high strength. light weight. facilities of office and ■ The DC motor and hydraulic circuit are completely sealed and thus there is no attachments residential environment. and fitness A new design concept different from the conventional hydraulic systems enables the broadening of new applications. Cylinder size retraction Cylinder bore i. buildings. 7 A 41 42 . 〜 Explanation of the operating mechanism ■ Cylinder "retraction" ■ "Stop" and load retention ■ Cylinder "extension" When the DC motor ① rotates in the reverse When power to the DC motor ① is When the DC motor ① rotates in the normal direction. and High pressure oil pumped out from the gear operated check valve.φ20 × 250 5.(The cylinder limit of its stroke. the cylinder ⑩ stops direction.φ 20 × 150 280 31 28. ■ For the automation and energy saving of general 【General description】 ■ The cylinder can be easily mounted with additional pins on both ends and purpose / industrial equipment completed electrical wiring. medical.7MPa due the cylinder ⑩ flows back into the gear pumps. The motor is protected from overload including automatic sunroofs ② Gear pump operation by the circuit breaker.4 Typical values at the ambient temperature 25℃ and rated voltage 350 φ40. When Hydraulic oil returning from the B port side of Hydraulic system spec. the overload relief valve ⑦ overloads or the cylinder stretches out to the (Overload relief extension temperature time Dimensions pressure (mm) (mm) (V) current (A) (kg)) out to the limit of its stroke. valves.6 sec/250 mm) pin diameter Electric current: Approx.8（DC12V） φ40.) and the white lead to the terminal ( ＋ ) extends φ34-φ20 3100 150 φ34. and the load is retained by the pilot. beauty.φ20 × 250 5.4（DC100V) φ40.. The hydraulic fluid returning from the Max pressure corresponding to the through the pilot-operated check valve ④ and flows into the cylinder from the A port side. the gear pump ② begins to rotate. allowing the preservation of the environment.2 φ34-φ20 5800 200 φ34. food Mini-Motion Package (MMP) is a hydraulic linear actuator integrated with a DC motor. ■ Others ③ Relief valve ④ Pilot-operated check valve Model ⑤ Control valve ⑥ Manual release valve (for emergency) ⑦ Overload relief valve ⑧ Oil reservoir ⑨ Slow return valve ⑩ Cylinder ▲ ▲ Retraction Stop Extension ※ Refer also to the following mechanism descriptions for the components.5 φ 34. a hydraulic pump. ■ For small vehicles.φ 20 × 200 330 speeds differ due to the receiving area difference.5 sec/250 mm) Electric current: Approx. No backlash is ■ For the automation and energy saving systems <Application> Hydraulic Circuit generated. ■ For compact transport equipment. for Relief the oil reservoir. recreation. Entire unit gear pumps and the surplus oil drains back to pressure increases to 13.1 13. the and the control valve moves to the position. 150 DC12 23（DC12V） φ40. 16 mm/s (15.7 MPa.3 cm3/min or High pressure oil from the gear pump passes less.3 MMP4-A 4.4（DC100V) φ40.4 350 φ40.φ 20 × 250 380 33 31 ● Example φ 40.8 ■ Waterproof : JISD0203 D2 compliant ■ Vibration durability: JISD1601 Class 3 B compliant Dimensions (unit: mm) Max. and screws.068 Retraction speed: Approx.1 Characteristics: 300 φ40. Power supply spec.φ20 × 150 4. 200 φ34.φ 20 × 200 330 φ 40. and green houses. ■ Low energy consumption and cost saving as the hydraulic pump is operated on processing equipment.φ20 × 200 4. and amusement equipment ■①〜⑩ All the following components are integrated in this hydraulic linear actuator. control valve ⑤ moves to the position.3 MMP4-B 7.d.φ20 × 300 5. to an increase in the temperature.5 150 DC12 40.φ 20 × 300 430 Model: MMP4-A2B250AA φ 40. Specifications A port side of the cylinder ⑩ flows back into the retained load is 13.φ20 × 150 4. the gear pump ② begins to rotate interrupted. (Assuming hydraulic oil is drawn from the oil reservoir ⑧． pumps passes through the pilot-operated check internal oil leakage of 0. thrust: equipment 8000N (816 kgf) ■ For Sports. activates for protection.φ20 × 300 5.1 300 φ40. 20 mm/s (12. ■ Smooth and strong operation are unique to the hydraulic system.2 retracts the cylinder.φ20 × 150 4.7 φ40-φ20 8000 250 DC100 4. agricultural vehicles.8 150 φ34. and clamps By making the best use of unique features of hydraulic system that are not gained by mechanical types such as electric request.1 13.Cylinders Cylinders Features Main applications Electro-Hydraulic Cylinder: Mini-Motion Package (MMP) ■ No new hydraulic facilities are required.φ 20-250 and a motor of DC 24 V When the extension thrust is 2000N Recommended Extension speed: Approx.φ20 × 350 5. Cylinder's extension and retraction φ 40. (MPa) valve setting) thrust (N) range℃ (sec. this is the best choice of labour-saving and automated work environment including machines. ■ The pilot-operated check valve secures load retention.φ20 × 200 4. which is different from mechanical types.7 φ40-φ20 4300 250 DC100 2. ① DC motor ■ The relief valve prevents overload. ■ For office.7 200 − 20 〜 50 DC24 11（DC24V） 30 φ40. and a cylinder. oil leakage. φ 40.025 φ 14 -0.φ 20 × 150 280 The above charts show the characteristics of MMP without the slow return valve orifice .φ20 × 150 4. Cylinder max. nursing.7 200 − 20 〜 50 DC24 18.φ20 × 200 4. Max.) starts working when the overload relief (MPa) ※ Connecting the black lead to the terminal ※ Connecting the black lead to the terminal (−) ( ＋ ) and the white lead to the terminal ( − ) valve activates.5 the cylinder.) valve ④ and flows into the cylinder from the B port side.φ20 × 350 5.φ 20 × 350 480 With a cylinder of φ 40.5（DC24V） 30 φ40. The relief valve ③ activates if The relief valve ③ activates if the system Series retention Rated Operating Rated valve set pressure Cylinder size Stroke Rated voltage Relief valve operation Weight the system overloads or the cylinder stretches example. such as residences.φ20 × 200 4. hoists. H1 H2 length rod diameter × stroke L φ 34. 6 A -0. power supply. After loosening the manual release valve by turning it two or three times with a hex wrench. ※ When the cylinder is diagonally positioned.025 -0. do it slowly after extending the cylinder. If the cylinder is kept in the extended position for a long time. in which the circuit breaker is often triggered. When removing the plug. is not recommended. Please contact us for any details. and other emergencies. the circuit breaker built in the DC motor will automatically turn off the MMP. dust deposits or rust may damage the oil seal. cylinder size.1 or 7. Try to select the model with thrust and speed large enough to meet requested specifications. Otherwise. ■ Caution on cylinders in operation ■ Check sheet <Relief valve> Do not activate the relief valve over 2 seconds. 【Wiring example】 <12 and 24 VDC> <100 VDC> Orifice diameter (calculated value) ● Use a bipolar. the oil may gush out because the tank is pressurized. select an orifice of φ 0.Cylinders Cylinders Caution on Selecting/Using Models ■ Selecting an orifice (slow return valve) Select proper models according to the following selection procedure and check sheet: ● If a hunting phenomenon occurs with the weight of the cylinder. double throw. (Hunting ● MMP specifications and characteristic values are typical ones and may vary depending on operational conditions like the phenomenon: Uncontrollable intermittent motion of a cylinder) temperature. ※ Select orifices for Port A and B according to the load applied to the cylinder. Continuing to use the MMP in conditions. In the case of D (compression and tension load). Otherwise. and stroke required of an MMP cylinder from the application and specifications of the equipment.3 cm3/min.) Mounting ● Mount the MMP with two parallel pins (recommended diameter: φ14 -0. ■ Disposal When disposing the MMP. a rise in the oil temperature or a malfunction may result. the cylinder can be extended or retracted by the hand or by its own weight. The relief valve set pressure is fixed (at 4. ※ Please contact us if you do not know the criteria for selection. <Duty cycle / Circuit breaker> ● All models are designed for an intermittent operation and will automatically shut down when operated continuously. an orifice will be required on the return side. power supply.068 ) and secure in place with split pins. select both A (compression For a compression load of 6 kN on the cylinder of (5) Selecting wire load) and B (tension load). electric wire break. It is not useful for speed control. B: Port B orifice (extension load). Use the MMP under the rated pressure (thrust) in intervals of 30 seconds within ED25% (pause over 90 seconds). Apply a mechanical lock for secure load retention. the circuit breaker will automatically reset enabling the restart of the MMP. ● The MMP can be easily mounted by securing the rod side to the load side and the bottom side to the frame of the equipment. ● Select a wire diameter suitable for a DC motor operation voltage applied in the range ±10% of the rated voltage.1 MPa) and cannot be changed. instantaneous-contact ● Use a 100-VDC MMP with the 100-VAC power supply via type switch with the switching off position at the an full-wave rectifier. keep the cylinder in the fully retracted position. ● When the allowable duty cycle is exceeded. D: Port A and B orifices (retraction and extension load) (4) Electric wiring and Switching ※ The customer should prepare the power supply and switching system. the cylinder may be extended or retracted using the manual release valve ⑥ . ● When the DC motor cools down. 43 44 . A: Port A orifice (retraction load). (Be careful of a free fall. maximum speed. (3) Select orifices for port A and B from the load to be applied to the cylinder at page 44. ※ An orifice is installed to prevent a hunting phenomenon. neutral point at the center for 12/24 VDC switching. ■ Storage When the MMP is not going to be used for a long period. φ 40. causing eventual malfunction. remove operating oil from the oil reservoir and cylinder. select kind of load by its own weight from A 〜 D. 【Note】 【Selection example】 1. unplug the oil tank. Make sure to test the selected MMP on the intended equipment. ● Maximum internal leakage may amount to 0.6. 2. 3. Please contact us for the parts marked with an asterisk ( ※ ). <Manual operation in case of an emergency> ● In case of power failure. (2) Select the relief valve set pressure. and cylinder stroke from the specifications and characteristics of the selected MMP model. ■ Selection Procedure (1) Determine maximum thrust. ◇ Pump pressure is the sum of all sections. P to C opening: For opening or closing the flow from the valve to the actuator and regulating Anti-cavitation (port relief) the flow rates to actuators. additional valves are arranged to be sectional. supplied to the downstream section (s). but the two. β: Coefficient. 【Relief override performance】 Note 1: Please specify the set pressure as「full flow pressure: MPa at L/min. ● The shut-off valve is used for plugging when no relief valve or ※ KYB products feature light lever operation and high durability by ① strict moving part anti-cavitation valve is used. ■ Spool Operation and Return to Neutral Position <Spool stroke (spool effort)> ● Manual operation: Most small valves are manually operated with levers. operation. flow dividing. and unloading valves. downstream section operation. etc. the equivalent area becomes smaller and the pressure drop increases. first. the priority placed on the upstream side. and multiple circuit models may be combined or a special circuit (e. ○ Against the spring force returning to the neutral position ( ). ● The overload relief valve (port relief valve) is used to pilot operation.) 【Return to neutral position】 ○ The operation force is shown with (----. ※ The port relief valve of a combination type provides relief and anti-cavitation ※ Spool opening adjustment (metering) during changeover enables fine-tuning of the functions. and the number of spools can be flexibly designed (general purpose and single-function ◇ Each machine can be operated independently ◇ When the upstream section operates. ● Directional control valves: directional change and check valves. opening the pilot poppet flow rate set for operation into account. ● Solenoid-operation: On-off or proportional changeover of the spool can be performed using the solenoid-operated valve. and pull) 【Pressure drop characteristics】 is commonplace. ※ Position: A three-position type (spool neutral. the difference of the pressure receptive areas between the tank regulating the return flow from the actuator. ※ A combination relief ◇ Cracking pressure: Pressure level valve is supplied as a standard accessory in order to to open the relief valve realize a compact design and high performance (static and ■ Combination Relief Valve Operation Relief valve ◇ Full flow pressure: Pressure and dynamic characteristics). exceeding the override pressure is required (over 2 MPa) to prevent pressure interference during a simultaneous operation. it may prevent the spool from returning or affect fine tuning capacity during ● The main relief valve is used to control the maximum pressure of the pump.and ◇ Override: Pressure difference between the cracking and full flow 【Metering characteristic】 backsides of the main poppet caused by the flow opens the main poppet to flow <Spool stroke opening area (flow rate) characteristic > oil from the work port to the tank port. etc. the friction of the ● Pilot operation: Most large-scale valves and multiple-valve-units for excavator and mini-excavator applications use a pilot valve allowing moving part works in the positive direction while moving from neutral to full stroke and in light force or parallel operation. 45 46 . Peak pressure on relief operation should be taken The work port pressure exceeds the pilot spring force. the lowest-pressure circuit is activated downstream section stops. the ◇ A simultaneous operation is possible irrespective of valves) ◇ On a simultaneous operation. followed by the mid-pressure circuit and then by the highest. tandem. two-pump conflux) may be integrated.g.) when the oil does not flow. override) than a direct-type relief valve. The pressure difference between the front. The hydraulic ● Often a return spring is adopted for the return to the neutral position.. performance. pressure reducing. When pressure on the port side is decreased lower than one on the tank side by C to T opening: For opening or closing the flow from the actuator to the reservoir and cavitation. second. ◇ Adjustment of the upstream spool enables the ◇ Semi-mono-block type: With mono-block as basic circuit design. Note 2: When setting the pressure of main relief valve and port relief valve. When flow force ■ Various accessory valves: An additional accessory valve may be installed on the inlet port of the pump or on each port. but also has pressure and flow control functions. etc. etc. ② use of low-friction sealing and wiper sealing. This way a decrease in flow force from the spool can ensure smooth prevent overload of the actuator. (----. P to T opening: For opening or closing the flow from the pump to the reservoir in the neutral The mechanism enables a compact design and better performance (smaller passage and regulating the partial flow to actuators. etc. to flow oil to the tank port. clearance management. operation generates"flow force"according to the flow rate and pressure. and accessory valves Basic Characteristics ■ Directional Control Operation【KVS65 model-sectional type】 ※ Load check valve: This valve prevents a drop in the load on the actuator caused by reverse flow of oil from the actuator during For the selection of a multiple control valve. and third section in this order with and the return oil of the upstream section is parallel (simultaneous). make sure not to let the flow rate exceed a rated value even momentarily. the negative direction while returning from full stroke to neutral. some systems require prototype tests. equipment or the absorption of lever operation impact.) varies depending on load conditions on the P and C from the tank side to the port side. variations. the following characteristics should be a spool change. ※ Carry over: Oil from the pump inlet may flow to the next circuit through the outlet of the last section. ● Pressure control valves: relief. Valve: Multiple Control Valve ※ The above examples are representative of each model. Priority is placed on the upstream section first.」 Please contact us when cracking pressure is required to be set.) are also available.and four-position types (for the loader's boom section. push. ※ Spool setting adequate for the system is possible by combination of opening area. ● The anti-cavitation valve is used to prevent cavitation in the actuator. <Classification by body construction> ◇ Mono-block type: The circuit and functions are designed for a specific model with simple construction (single-function valves) <Characteristics> ◇ Sectional type: The basic circuit. sides. and third section in second. examined. As the number of spools increases. Basic construction. remember that pressure difference between the two. Valves Valves Basic Circuit (parallel. ● Flow control valves: throttle. ※ Our products are designed in a compact form to reduce pressure loss. Therefore. A: Valve opening area. (Special-purpose valve) pressure circuit. and series circuits) ● Parallel circuit ● Tandem circuit ● Series circuit Oil from the pump is supplied to the Oil from the pump is supplied to the first. The relationship between pressure drop and flow rate is expressed by the formula: P = β･Q2/A2 Q: Flow rate. but a mechanical or electric detent system is also used. The multiple control valve mainly provides the directional control function for supplying oil to each actuator. and work port sides of the main poppet opens the main poppet to let oil flow ※ The flow characteristic (----. is too large. and P: Pressure As pressure increases by the square of the flow rate. the load. and pressure compensation valves. Please contact us for circuit configurations. ◇ Simultaneous operation is possible with an adjustment of spools. and ③ adoption of fluid-force-reduction spools. <Circuit Diagram example (for a ※ A lever operation in error while the engine is off will not lower the lift. and Lowering of The circuit combines return oil from the actuator with oil from the pump. more than two pump ports are installed to regulate flows separately for the travel motors (left and right). When attachment sections are operated with two travel motors in action. (Energy saving effect) ※ This position is required for leveling the ground. Please contact us ※ Two valves for lifting and tilting compose the basic mono-block on which regarding your application. ※ A pressure compensation valve is incorporated in the mono-block construction. such as Boom 1 and 2.). Each boom and arm cylinder requires two sections. sections for attachments can be added. (2) Floor amplifier By using the valve in conjunction with the pump to provide the discharge for Main spool switching by means of a stroking adjustment corresponding to only the required pressure and required flow according to lever operation. (KVML) for attachment.and tandem-pump systems are available. ※ Suitable for orbit pump systems. Anti-drift valve ※ Traveling is possible while keeping the valve at the detent position. During a boom or arm operation with other actuators not in use. Lift lock valve ※ Various functions are incorporated to operate all actuators in simultaneous operation. ※ A simultaneous operation of the swing and arm sections or the boom and arm sections becomes easy. The boom is kept at the lifting position with magnetic detent. Priority in a multiple operation Flow regulator valve (FRV) In a simultaneous operation of actuators with different working pressure. boom regeneration) ※ Two valves for the boom and bucket compose a basic mono-block on ※ The valve enables the division of oil from the control valve to additional valves which sections for attachments can be added.Valves Valves Additional functions of the special-purpose valve ■ For forklift truck applications Additional functions of the single valve [Refer to both explanations for ① to ⑤ and the circuit diagram on the right] ※ Based on our long experience. ※ Load drop from the fork due to mast tilting is prevented even when the ※ Increasing cylinder speed improves work efficiency. adequate for steering can be maintained at both high and low speed. causing an The supply side pressure opens the return line. Two-stage main relief valve Bucket crowding detent Adding signal pressure to the standard main relief valve can raise set A mechanism to maintain a bucket crowding position pressure. oil discharged from the pump. it A safety valve (flow control valve) to limit the maximum lift lowering speed. prohibiting the lift from falling down. so ※ The performance is not affected by the engine speed. Better sealing performance with the poppet valve reduces oil leakage. ※ To be used in combination with the LS valve and LS pump. we have made available necessary additional functions for each machine. solenoid valve Conflux circuit ※ A lever operation in error will not raise the lift. it is easy to improve simultaneous <Pump method> operation performance by electronic control. as to improve work efficiency. Boom lowering floating position Regeneration circuit In addition to the three positions for Neutral. swing A type corresponding to the load sensing steering unit is also available. Since the valve is not influenced by load. and bucket cylinder. etc. a supply flow low energy consumption system can be realized easily. In total there are nine [Various safety mechanisms] ※ For securing safe operation sections. This is to insure safety by prohibiting the lift raising operation by ※ Straight travel is possible while operating travel motors and another connecting the pump line to the reservoir line with electric signals to the attachment sections at the same time. 【Load sensing valve】(KVSX) ※ Light steering force generates great power. (Load pressure <Operation mechanism> sensing variable displacement pump at page 17. ※ In most cases. prevents much oil from flowing into lower pressure line. ⑦ Two-stage relief valve ※ Please select the one appropriate for your system. The return line Straight travel circuit to the cylinder is stopped by solenoid valves. ※ A special valve for articulated wheel loader steering positive/negative control.) (1) Manual: Mechanical linkage compatible ※ See page 20 for the working mechanism of the load sensing system. Lifting. The boom is kept at the drifting position with magnetic detent. (KVMF) Flow priority valve (VPF) ■ For Excavator and Mini-excavator The pump flow is delivered to the hydraulic power steering system with [Refer to both the explanations for to and the circuit diagram on the right] priority through the PF port. Both single. the brief explanation)> straight travel valve works to supply oil from P2 pump to other sections and Unloading valve oil from P1 pump to left and right travel motors. These functions are provided as standard specifications for some models and as options for others. and Arm 1 and 2. ⑤ Regeneration circuit (e. ※ The lift lowering speed can be adjusted. The the boom. increase in the total oil flow. a auxiliary section is installed for attachment purposes.g. A compact design can be made with less piping and no conflux circuit. This is a safety valve. The poppet valve and the pilot unit for the opening and closing of the poppet ⑥ Anti-drift valve Boom lowering detent valve are incorporated between the flow from the spool and the cylinder port. ■ For wheel loader application (boom and arm) Neutral flow cut-off valve [Refer to both explanations for to and the circuit diagram on the right] The valve closes the neutral flow of the control valve to raise pump pressure. <Pressure compensator model> The tuning period can be reduced as the flow characteristic can be easily As the supply flow is controlled by the main spool opening. the oil flow to Tilt lock valve Boom 2 and Arm 2 is added to the oil flow to Boom 1 and Arm 1. motor. On top of that. ※ It is usable when more driving force is required. Please contact us for other additional functions such as a spool switch ■ For wheel loader application (steering) [KVMT] detection function and a pump control signaling function (load sensing. a flow rate estimated. given by connecting the line between the cylinder rod and bottom and the ※ Increasing the cylinder speed is useful in preventing cavitation and recycling reservior. It is Boom lifting detent also very useful in preventing the boom or arm from falling down. 47 48 . Easy flow setting for each valve section. lever is operated accidentally while the engine is off. the fourth position for drifting (lowering by its own weight) is circuit is used for arm and boom. Carryover Multiple mono-block cast products are manufactured by KYB Cadac. KVMF. wheel loaders.excavators KVSE-72 KVSX-14 【General purpose KVS-65】Mainly used for mini-excavators. 【Optional functions】 KYB provides a wide variety of valves which Main relief valve Overload relief valve includes hydraulic control valves. and industrial equipment 【Optional functions】 Main relief valve Overload relief valve Anti-cavitation valve Detent Four positions Carryover KVMG-270 【Optional functions for forklift trucks】 Flow priority valve Tilt lock valve ■ KVS.Valves Valves Dimensions (typical example) (unit: mm) Valve: Multiple Control Valve ■ KVS Series: General purpose A control valve works a single actuator or multiple actuators simultaneously. forklift trucks and industrial equipment multiple functions. and other applications KVMF-70 KVMT-200 49 50 . one of KYB's affiliated companies. forklift trucks. ■ KVS and KVM Series ● For excavators and mini. and electro-hydro Anti-cavitation valve valves with electric and hydraulic control systems Detent Four positions combined. and may incorporate 【General purpose KVS-31】Mainly used for mini-excavators. and KVMT Series ● Multiple control valve for forklift trucks. Main relief valve 【Optional functions】 Overload relief valve forklift trucks. and industrial equipment 【Optional functions】 【KVS-65PSL optional functions】 Main relief valve Main relief valve Overload relief valve Overload relief valve Anti-cavitation valve Anti-cavitation valve Detent − Detent − Four positions − Four positions − Carryover Carryover − 【Optional functions for forklift trucks】 Flow priority valve Tilt lock valve <KVS-65PSL main features> ● Based on KVS-65. operating the spool with the internal pilot type proportional solenoid pressure reducing valve. and industrial equipment Main relief valve Anti-cavitation valve Overload relief valve Detent − Anti-cavitation valve Four positions − Detent Carryover − Four positions Carryover 【Optional functions for forklift trucks】 Flow priority valve Tilt lock valve 51 52 . Valves Valves Dimensions (typical example) (unit: mm) 【General purpose KVS-200】Mainly used for medium. ● The pressure compensation mechanism (optional) enables stable flow unaffected by load pressure fluctuation. [General purpose KVS-600]Mainly used for various large-sized construction equipment 【Optional functions】 【General purpose KVS-120】Mainly used for a variety of compact construction equipment.and large-sized construction equipment 【General purpose KVS-65PSL】 Mainly used for compact construction equipment. forklift trucks. 5 30.5 88.5 3/4 19.5 50.2 27. Valves Valves 【General purpose KVS-1000】Mainly used for various large-sized construction equipment ■ KVSE/KVSX Series: Special models for mini. sizes) 47.8 20.5 M10 × 1.8 19.5 ー ー ー ー Upper rows: Standard pressure (3000 psi) Lower rows: High pressure (6000 psi) 【Built-in functions】 Straight travel Attachment ※ Internal boom conflux − Spool neutral position detecting signal Pump control signal output − Overload relief valve 【Optional functions】 Anti-drift valve Add-on for spool section Add-on of third pump spec.7 M14 × 2 69.7 22.3 M14 × 2 2 50.9 22.8 25.3 M12 × 1.4 57. Regeneration circuit Arm closing variable regeneration Two-staged main relief Flow priority at multiple operation ※ Available on request Neutral cut-off valve − ● Split Flange Dimensions 【KVSE-72 for mini.excavators】 Nominal H D Ｅ F G sizes (Ref.8 35. 【KVSE-36 for mini. Regeneration circuit Arm closing variable regeneration Two-staged main relief Flow priority at multiple operation ※ Available on request Neutral cut-off valve − 53 54 .4 26.8 22.4 36.8 M12 × 1.8 96.8 42.2 M16 × 2 77.4 33.9 50.1 79.2 17.4 M14 × 2 2 1/2 63.7 30.7 31.8 23.1 52.2 23.5 1 25.75 1 1/4 31.4 M20 × 2.excavators】 【Optional functions】 Main relief valve Overload relief valve Anti-cavitation valve Detent − Four positions − Carryover − 【Built-in functions】 Straight travel Attachment ※ Internal boom conflux − Spool neutral position detecting signal Pump control signal output − Overload relief valve 【Optional functions】 Anti-drift valve Add-on for spool section Add-on of third pump spec.3 M14 × 2 1 1/2 38.2 17.8 44.75 58.6 22.excavators are incorporated.8 66.excavators Various functions for mini.1 M10 × 1. − Add-on of third pump spec.Valves Valves Dimensions (typical example) (unit: mm) ■ KVMM/KVMG Series: Special models for excavators 【KVSX-12 for mini-excavator load sensing】 【KVMM-80】For excavators in the 6-9 ton class range ※ To be used in combination with the LS pump. Regeneration circuit 【Built-in functions】 Arm closing variable regeneration − Straight travel − Two-staged main relief Attachment ※ Flow priority at multiple operation Internal boom conflux − Neutral cut-off valve Spool neutral position detecting signal Pump control signal output − 【KVMM-160】For excavators in the 10-16 ton class range Overload relief valve 【Optional functions】 Anti-drift valve Add-on for spool section − Add-on of third pump spec.) 【Built-in functions】 Straight travel Attachment Internal two sections conflux Spool neutral position detecting signal Pump control signal output − Overload relief valve 【Optional functions】 Anti-drift valve Add-on for spool section Add-on of third pump spec. Regeneration circuit − Regeneration circuit Arm closing variable regeneration − Arm closing variable regeneration Two-staged main relief Two-staged main relief Flow priority at multiple operation − Flow priority at multiple operation Neutral cut-off valve − Neutral cut-off valve ※ Available on request 55 56 .) 【Built-in functions】 【Built-in functions】 Straight travel − Straight travel Attachment ※ Attachment Internal boom conflux − Internal boom conflux Spool neutral position detecting signal Spool neutral position detecting signal Pump control signal output − Pump control signal output Overload relief valve Overload relief valve 【Optional functions】 【Optional functions】 Anti-drift valve Anti-drift valve Add-on for spool section − Add-on for spool section Add-on of third pump spec. − Regeneration circuit − Arm closing variable regeneration − Two-staged main relief Flow priority at multiple operation − ※ Available on request Neutral cut-off valve − 【KVSX-14 for mini-excavator load sensing】 ※ To be used in combination with the LS pump. (See “Load sensing pump” at page 19. (See “Load sensing variable displacement pump” at page 19. − (Removable on request) Regeneration circuit [Option] Arm closing variable regeneration ○ Lift lock valve Two-staged main relief Priority at multiple operation ○ Tilt lock valve Neutral cut-off valve − ○ Unload valve 【KVMG-400】For excavators in the 40-50 ton class range 【Built-in functions】 Straight travel Attachment Internal two units conflux Spool neutral position detecting signal Pump control signal output Overload relief valve 【Optional functions】 Anti-drift valve Add-on for spool section − Add-on of third pump spec.Valves Valves Dimensions (typical example) (unit: mm) ■ KVMF Series: Special models for forklift trucks 【KVMG-270】For excavators in the 20-30 ton class range 【KVMF-70】For forklift trucks in the 1-3 ton range 【Configuration】 Parallel Circuit Tandem − Manual Operation type Pilot Additional sections Add-on Overload relief valve 【Built-in functions】 Straight travel Attachment [Features] Internal two units conflux ○ Flow priority valve (VPF): Standard Spool neutral position detecting signal accessory Pump control signal output Overload relief valve (Removable on request) 【Optional functions】 ○ Flow regulator valve (FRV): Standard Anti-drift valve accessory Add-on for spool section − Add-on of third pump spec. − Regeneration circuit Arm closing variable regeneration Two-staged main relief Priority at multiple operation Neutral cut-off valve 57 58 . 5 m3) and forklift trucks (over 7 tons) ※ A special valve for articulated wheel loader steering 【KVMT-200 for loader (steering)】For wheel loaders in the 2. ○ Both single.5 m3 range 【Configuration】 【Configuration】 Parallel − Circuit Parallel Tandem − Circuit Manual Tandem Operation type Manual Pilot Operation type Additional sections Add-on − Pilot Additional sections Add-on Overload relief valve Overload relief valve [Features] [Option] ○ Built-in pressure compensation valve ○ The detent function is added to the ○ Both single.5-4 m3 range 【KVMT-400 for loader (steering)】For wheel loaders in the 6-13 m3 and over range 【Configuration】 【Configuration】 Parallel − Circuit Parallel Tandem − Circuit Tandem Manual Operation type Manual Pilot Operation type Pilot Additional sections Add-on − Additional sections Add-on Overload relief valve Overload relief valve [Features] [Features] ○ Built-in pressure compensation valve ○ The boom section is of the four.5-5.and double-pump types drift position of the boom section are available ○ Tilt lock valve ○ Carryover circuit provided 【KVML-270 for loader (main)】For wheel loaders in the 2.and double-pump types position switching type with the drift are available position added to the lowering position ○ Carryover circuit provided 59 60 . Valves Valves ■ KVML Series: For loaders (main) and forklift trucks ■ KVMT Series: For loader (steering) applications 【KVML-200 for loader and forklift trucks】For wheel loaders (2-3. 5 G3/8(PF3/8) 22 69 41 16 PT3/8 75 18 25 DS-04 67 16 10 16 25 18.8 MPa E: JIS B8363 parallel pipe male threads-female seat joint DS-04: More than 2. FC-06 153 153 20 113 18 60 G3/4(PF3/4) 55 22 ● The following pressures should be retained after blocking: Note: DS-03: More than 1.J G H Caution upon handling FC-03 87 100 15 70 12 37 G3/8(PF3/8) 32 18 ● Select a model with sufficient blocked flow against an excessive flow expected during switchover.5 MPa J: JIS B8363 parallel pipe male threads-male seat joint 61 62 . (The valve functions comply with the Japan Industrial Vehicle Association Standard's safety criteria. The down safety valve is available with “flow blocking”and “flow reduction” types. FC-04 120 120 20 84 16 48 G1/2(PF1/2) 41 20 ● Do not use in applications in which open-close cycles are constantly repeated.2 G1/2(PF1/2) 27 89 55 18 PT1/2 93 20 31 DS-06 − 20 − − − − G3/4(PF3/4) 36 98 58 20 PT3/4 100 22 40 Note: ■ Dimensions (unit: mm) F: JIS B8363 parallel pipe male threads-female seat joint G: JIS B2351 parallel threads O-ring seal joint R: JIS B8363 parallel pipe male threads-male seat joint M: JIS B0203 pipe tapered threads Model L1 L2 A B C φD E. The valve detects hydraulic piping damage or an abnormal (excessive) flow rate and blocks or reduces the flow. (Please contact KYB sales department. This valve is suitable for controlling maximum speed and regulating the lowering of speed.F. The flow is maintained at a fixed rate without being affected by the load fluctuation. ■ Performance curve Hydraulic oil: ISO VG32 / Oil temperature: 40｡C Model L1 A B C D E F/G/R H L2 J K M L3 Q φN DS-03 49 12 8 12 17 14.2 MPa F: JIS B8363 parallel pipe male threads-female sheet joint as well as JIS B2351 O-ring seal type DS-06: More than 1. Mounting one at the actuator port improves work and ■ Flow Control Valve equipment safety. and thus the details have been omitted here.) Flow Control Valve ■ Features This is the in-line directional flow control valve with pressure compensation function.) ■ Down Safety Valve Symbol ■ Hose Rupture Valve ■ Performance curve ■ Dimensions (unit: mm) Hydraulic oil: ISO VG32 / Oil temperature: 40℃ ● Pressure drop characteristic ※ The hose rupture valves are designed for each application considering the equipment and cylinder specifications.Valves Valves Down Safety Valve Valve: Single-function Valve ■ Features Please consult us for other models not included in this catalog. and the reverse direction is made to free flow. Temperature graphs 4.5 Ｎ・m/s ＝ 75kgf・m/s Where. ρ: Hydraulic oil density〔kg/3〕 P・D・ ηT 〔N*m〕Consequently D = 2π・T T= 〔cm3〕 2π P・ηT 2π・T (2) Spool leak amount q P= 〔MPa〕 π db3 D・ηT q= D・N 12μl（l ＋ 1. （ ） GD2=GD 21＋ GD 22・ ＋ N2 2 GD2・ N3 2 N1 3 （ ） N1 <Valve related formulas> GD2: Whole GD2 on one axis (1) Pressure and flow rate Q before and after throttle GD 2 1 and N1: GD2 on the first axis and revolution velocity Ｑ＝ 60ｃＡ√ 2Δ ρ Ｐ GD 22 and N2: GD2 on the second axis and revolution velocity Q: Flow rate〔L/min〕 GD 2 3 and N3: GD2 on the third axis and revolution velocity c: Flow coefficient〔0. specifications. etc. The output torque of a hydraulic motor varies at operation Δ P: Pressure difference before and after throttle〔MPa〕 start and during operation. 2. μs: Moving angle static friction coefficient μD: Moving surface dynamic friction coefficient M: Load mass〔kg〕 Fine pitch strength grade II Unit : N・ｍ（kgf・m） g: Gravitational acceleration〔m/s2〕 a: Acceleration〔m/s2〕 V: Cylinder velocity〔m/s〕 t: Acceleration time〔s〕 k: Spring constant〔N/mm〕 x: Spring displacement〔mm〕 Select a cylinder considering the load magnitude.6 〜 0. ηT v: Volumetric efficiency of a hydraulic motor 63 64 . Static friction resistance F1 ＝μS・m・g〔N〕 Dynamic friction resistance F2 ＝μD・m・g〔N〕 dV Inertia load F3 ＝ m・ａ＝ m・ dt 〔N〕 Elasticity load F4 ＝ k・x〔N〕 Where. When the compression force is great.7〕 Select a hydraulic motor considering the magnitude of the load A: Throttle area (opening)〔mm2〕 torque. σ : Tensile strength〔N/mm2〕 Static friction torque π A1: Piston rod area A1 ＝ 4 ・d 〔mm 〕 2 2 Breakaway torque T1= μS・m・g・R〔N・m〕 A2: Cylinder effective area A2 ＝ F 〔mm2〕 Dynamic friction torque T2= μD・m・g・R〔N・m〕 PR dω GD2 2π・N N・GD2 PR: Pressure on cylinder〔MPa〕 Inertia torque T3=I・ ＝ ・ ＝ 〔N・m〕 dt 4 60t 38t Where.shaft dia. Determine the cylinder size and obtain the required pressure R: Bearing radius of rotating object (m) and flow. Tightening Torque for Piping (Reference data) Note: The tightening torque may vary depending on various conditions such as material.) /〔μm（10-3mm） 〕 P: Effective pressure of a hydraulic motor〔MPa〕 ε : Eccentricity (spool eccentric distance) / b N: Revolution velocity of a hydraulic motor〔min-1〕 μ : Viscosity (Pa*S) Use hydraulic oil ISO VG32 in cold areas and ISO VG46 in Flow rate Q [L/min. . I: Inertia moment of rotating object〔kg・m2〕 F P1 ＝ 〔MPa〕 GD２: Flywheel effect A1 2π・N 〔rad/s2〕 Q ＝ A1・V × 10-3〔L/min〕 ω : Revolution angular velocity ω = 60 ω 2π・N Where P1: Pressure required of a cylinder〔MPa〕 ω : Revolution angular acceleration = 〔rad/s2〕 Q: Flow rate required of a cylinder〔L/min〕 t t 60t N: Revolution velocity (min-1) F: Cylinder thrust〔N〕 t: Acceleration time (s) A1: Inlet side pressure receiving area〔mm2〕 3. and the former is more important. (2) G O-ring boss joint Unit: N・ｍ （kgf・m） (3) Unified O-ring boss joint Unit: N・ｍ （kgf・m） √ π・σ 〔mm〕 Piston rod diameter d ＝ 4 × F・S Reference：1kW ＝ 103 Ｎ・m/s ＝ 102kgf・m/s √4（Ａ1π＋Ａ２）〔mm〕 Cylinder bore D ＝ 1PS ＝ 735.5ε2） ΔＰ Q= 1000ηV 〔L/min〕 q: Leak amount〔cm3/s〕 Where. Determine standard dimensions of the hydraulic cylinder to satisfy the calculated dimensions.Main Formulas (Source: Extracted from the Practical Hydraulic System Pocket Book) published by the Japan Fluid Power Association) (1) Metric screw <Formulas for Pump and Motor Characteristics (The International System of Units)> <Cylinder related formulas> ■ Reciprocation load and cylinder selection Coarse pitch strength grade II Unit : N・ｍ（kgf・m） A double acting movement is considered to generate the following loads. d: Spool diameter〔mm〕 D: displacement volume of a hydraulic motor〔cm3〕 l: Lap length (clearance length)〔mm〕 T: Output torque of a hydraulic motor〔N・m〕 b: Clearance (hole dia. Working oil viscosity . The following figures represent hypothetical conditions: 1.] ηTT: Torque efficiency of a hydraulic motor △ P: Front and rear pressure difference〔MPa〕 warm areas. <Motor related formulas> F: Cylinder load〔N〕 ■ Revolution load and hydraulic motor selection S: Safety factor Rotation is considered to generate the following loads.Flow characteristic Sum of GD2 in multi-axis rotation: V: Cylinder velocity〔m/min〕 Where. Throttle pressure . tightening methods. consider the rod buckling strength. Ltd.Minami-ku. Ltd. (Approx: fifty minutes from Meitetsu Nagoya station in total) Sales branch（Sendai.Asamizodai. Japan ● About fifteen minutes by taxi from Sagami-Ono station on the Odakyu Line ● Two-minute walk from Kanigawa station on the Inuyama Line bound for Mitake- ● About ten minutes by taxi from Kobuchi station on the JR Yokohama Line cho and Shinkani (via Inuyama towards) that starts at Meitetsu Nagoya station.Sagamihara-shi.. Japan ● From Meitetsu "Meitetsu Nagoya" station the Inuyama Line Mitake. Typical Applications and Products Global Network KYB's global production system meets the needs of customers everywhere by timely providing high performance. Ltd.Japan 505 Dota. motors. Gifu. and MMPs for agricultural equipment Pumps. and motors for wheel loaders and skid-steer loaders Pumps. Kani-shi. Service and OEM Gifu South Plant ／ Gifu East Plant: KYB-YS Co. Office（Saitama）. Kani-shi.: （KIMZ）KYB Industrial Machinery（Zhenjiang） : ＊ ＊ ＊ ＊ CNH Industrial（Itaria:Cylinder） ■ Gifu East Plant 60 Dota. Hiroshima）Domestic After sales (distributor sale).Kanagawa. HSTs. Osaka. Nagoya. ＊ KYB Engineering and Service Co. and cylinders for forklift trucks Regional Headquarters Production Base Major business locations Sales Office/Other Services Domestic manufacturing plant ＊ ■ Sagami Plant ■ Gifu South Plant KYB Trading (Shanghai) Co. Head office（Tokyo）. Pumps. Gifu. Shinkani area (via Inuyama) It is approximately five minutes by taxi from "Kanigawa" station 65 66 . and cylinders for excavators and mini-excavators Pumps. valves.. valves. valves.. high quality products that satisfy customer requirements. valves. 1-12-1.